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Finding the Fourth Proportional to 648,053.60, 972,080.40 and 621,809.60

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Solution

The fourth proportional to 648,053.60, 972,080.40 and 621,809.60 is: 932,714.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,053.60 : 972,080.40 = 621,809.60 : x
  2. Step 2: Convert to fraction form
    648,053.60/972,080.40 = 621,809.60/x
  3. Step 3: Cross multiply
    648,053.60x = 972,080.40 × 621,809.60
  4. Step 4: Simplify right side
    648,053.60x = 604,448,924,691.84
  5. Step 5: Solve for x
    x = 604,448,924,691.84/648,053.60
  6. Step 6: Final answer
    x = 932,714.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.